Ultra-thin organicfilms must be screened when deposited onto freshly prepared metal surfaces in view ofpreserving the molecular physical-chemical properties. A current promising strategy prescribes the oxidation ofthe substrate and, when possible, the creation of a single oxide layer. This strategy was successfully exploitedwith metal-tetra-phenyl porphyrins (M-TPP) on Fe(0 0 1)-p(1 × 1)O. Here, our study is extended to the oxidizedCu(1 1 0)-(2 × 1)O. Having free coordination sites, the Co-TPP is perturbed when deposited onto the freshlyprepared copper surface and the HOMO-LUMO levels quenched, as reported in the literature. Here, we provethat the oxide copper surface reduces the molecule-substrate interaction and photoemission spectroscopy is ableto reveal the characteristic electronic features of the molecules.

Persistence of the Co-tetra-phenyl-porphyrin HOMO-LUMO features when a single organic layer is grown onto Cu(1 1 0)-(2 × 1)O

Bussetti, Gianlorenzo;Albani, Guglielmo;Calloni, Alberto;Sangarashettyhalli Jagadeesh, Madan;Duò, Lamberto;Ciccacci, Franco
2020

Abstract

Ultra-thin organicfilms must be screened when deposited onto freshly prepared metal surfaces in view ofpreserving the molecular physical-chemical properties. A current promising strategy prescribes the oxidation ofthe substrate and, when possible, the creation of a single oxide layer. This strategy was successfully exploitedwith metal-tetra-phenyl porphyrins (M-TPP) on Fe(0 0 1)-p(1 × 1)O. Here, our study is extended to the oxidizedCu(1 1 0)-(2 × 1)O. Having free coordination sites, the Co-TPP is perturbed when deposited onto the freshlyprepared copper surface and the HOMO-LUMO levels quenched, as reported in the literature. Here, we provethat the oxide copper surface reduces the molecule-substrate interaction and photoemission spectroscopy is ableto reveal the characteristic electronic features of the molecules.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/1132615
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